Mercurial > dive4elements > river
comparison gwt-client/src/main/java/org/dive4elements/river/client/server/FixingsKMChartServiceImpl.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Thu, 25 Apr 2013 15:23:37 +0200 |
parents | flys-client/src/main/java/org/dive4elements/river/client/server/FixingsKMChartServiceImpl.java@821a02bbfb4e |
children | 172338b1407f |
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5837:d9901a08d0a6 | 5838:5aa05a7a34b7 |
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1 package org.dive4elements.river.client.server; | |
2 | |
3 import org.dive4elements.artifacts.common.utils.XMLUtils; | |
4 | |
5 import org.dive4elements.artifacts.httpclient.http.HttpClient; | |
6 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl; | |
7 | |
8 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException; | |
9 | |
10 import org.dive4elements.artifacts.httpclient.http.response.StreamResponseHandler; | |
11 | |
12 import java.io.IOException; | |
13 import java.io.InputStream; | |
14 import java.io.OutputStream; | |
15 | |
16 import javax.servlet.http.HttpServlet; | |
17 import javax.servlet.http.HttpServletRequest; | |
18 import javax.servlet.http.HttpServletResponse; | |
19 | |
20 import org.apache.log4j.Logger; | |
21 | |
22 import org.w3c.dom.Document; | |
23 import org.w3c.dom.Element; | |
24 import org.w3c.dom.NodeList; | |
25 | |
26 public class FixingsKMChartServiceImpl | |
27 extends HttpServlet | |
28 { | |
29 private static final Logger log = | |
30 Logger.getLogger(FixingsKMChartServiceImpl.class); | |
31 | |
32 public static final String SERVICE_NAME = "fixings-km-chart"; | |
33 | |
34 public FixingsKMChartServiceImpl() { | |
35 } | |
36 | |
37 public void doGet(HttpServletRequest req, HttpServletResponse resp) { | |
38 | |
39 log.info("FixingsKMChartServiceImpl.doGet"); | |
40 | |
41 String url = getServletContext().getInitParameter("server-url"); | |
42 String locale = req.getParameter("locale"); | |
43 String filter = req.getParameter("filter"); | |
44 | |
45 if (filter == null || filter.length() == 0) { | |
46 log.warn("Missing 'filter' parameter."); | |
47 return; | |
48 } | |
49 | |
50 if (locale == null || locale.length() == 0) { | |
51 locale = "de"; | |
52 } | |
53 | |
54 Document filterDoc = XMLUtils.jsonToXML(filter); | |
55 | |
56 if (filterDoc == null) { | |
57 log.warn("Creating filter document failed."); | |
58 return; | |
59 } | |
60 | |
61 InputStream in; | |
62 | |
63 try { | |
64 HttpClient client = new HttpClientImpl(url, locale); | |
65 in = (InputStream)client.callService( | |
66 url, // XXX: Why? The URL is passed by construction already. | |
67 SERVICE_NAME, | |
68 filterDoc, | |
69 new StreamResponseHandler()); | |
70 } | |
71 catch (ConnectionException ce) { | |
72 log.error(ce); | |
73 return; | |
74 } | |
75 | |
76 resp.setHeader("Content-Type", guessMIMEType(filterDoc)); | |
77 | |
78 try { | |
79 OutputStream out = resp.getOutputStream(); | |
80 | |
81 byte [] buf = new byte[4096]; | |
82 int i = -1; | |
83 while ((i = in.read(buf)) >= 0) { | |
84 out.write(buf, 0, i); | |
85 } | |
86 out.flush(); | |
87 } | |
88 catch (IOException ioe) { | |
89 log.error(ioe); | |
90 } | |
91 finally { | |
92 try { in.close(); } | |
93 catch (IOException ioe) { /* ignored */ } | |
94 } | |
95 } | |
96 | |
97 protected static String guessMIMEType(Document document) { | |
98 | |
99 NodeList formats = document.getElementsByTagName("format"); | |
100 | |
101 String format = "png"; | |
102 | |
103 if (formats.getLength() > 0) { | |
104 String type = ((Element)formats.item(0)).getAttribute("type"); | |
105 if (type.length() > 0) { | |
106 format = type; | |
107 } | |
108 } | |
109 | |
110 return "image/" + format; | |
111 } | |
112 } | |
113 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |